From a friend...
Lecture on four letters of Freud, delivered in Philadelphia on 22 September 1990 by K. R. Eissler. To my knowledge it is the only recording of Eissler's voice publicly accessible. The lecture he gives, entitled "An Interpretation of Four Letters by Freud," is a brilliant one and provides us with a wonderful example of Eissler's public speaking. It occurred as part of a symposium held at the Institute of Pennsylvania Hospital in Philadelphia on 22 September 1990; the symposium was entitled "Understanding Freud," and it eventually was published (same title) by NYU Press.